Improvement in draw-bridge gates



0. ESCHE.

DRAW-BRIDGE GATES.

Patented Dec.14,1875.

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NITED STATES PATENT OFFICE,

OTTO ESCHE, OF MILWAUKEE, WISCONSIN.

IMPROVEMENT IN DRAW-BRIDGE GATES.

Specication formingipart of Letters Patent No. 171,003, dated December 14, 1875; application filed December 6, 1875.

To all whom it may concern:

Be it known that I, OTTO ESCHE, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Bridge-Gates; and I do hereby declare that the following is a full, clear, and exact description thereof, which will en able others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, and to the letters of reference marked thereon, which form a part ot' this specification.

My invention relates to that class of drawbridges in which the draw swings on a center, and a gate is raised at each end of the bridge; and the nature of my invention consists in the construction and arrangement of devices whereby the gate may be raised before the draw commences to open, and in the combination of parts, as will be hereinafter more fully set forth.

In the annexed drawing, Figure 1 is a plan View of a bridge embodying my invention. Fig. 2 is a longitudinal section of the same through the line am, Fig. 1. Fig. 3 is a transverse section through the line y y, Fig. l. Fig. 4 is a bottom view of one end of the draw.

A represents the stationary part of a bridge, and B is the draw, which latter turns upon a carriage, C, around a central pivot, c, in the usual manner. D is the gate across the bridge A, near the point where the draw B closes thereto, said gate being raised,l by one or more weights or springs, or any other suitable or convenient means. The bottom of the gate has a chain, rope, or wire cable, b, attached to it, which passes around pulleys d d, as shown in Fig. 2, and is attached to a vertical sliding bar, G, arranged in a frame-Work, E, under the end of the draw B. The sides of the barGare grooved longitudinally, and work over rollers e e, so that the bar canmove freely up and down. This bar moves upward by the upward motion of the gate, and when the bar is pushed down it draws the gate down ward with it. To the under side ofthe draw B are attached guides f f, on which slides a frame, H, constructed to form inclines for another arm or crank, n', from the end of which a connecting-bar, J, extends up through a slot in the draw, and is pivoted to the end of a lever, L, pivoted to a standard, K. The other end of this lever is pressed down and held under a suitable catch, p. When the 1ever is thus held, the frame H is in proper position to operate on the bar G.

The operation then is the same as in other draw-bridges of this character. As the bridge is being opened, the gate D rises by the action of the weights connected therewith, and as the bridge closes, the frame H, riding on top of the roller t in theupper end ofthe bar G, draws the gate down.

When the bridge is closed, if itis desired to have the gate raised before the draw commences to open, the lever L is released from its catch at p and raised, which movement, by the connections above described, draws the frame H backward from off the upper end of the sliding bar G, allowing the weights connected with the gate to raise the same, and

the draw is then to be opened.

In case any persons should be left on the bridge, when the gate is thus raised, I provide a side gate, P, on each side, having a spring-latch, t, as shown, which will 4giveA facility for such persons to get ofi' before the draw is entirely opened.

Having thus fully described my invention, what l claim as new, and desire to secure by Letters Patent, is Y 1. The combination of the vertically-sliding gate D, rope or chain b, pulleys d d, grooved In testimony that I claim the foregoing asV my own I affix my signature in ,presence of two Witnesses.

OTTO ESCHE.

Witnesses:`

WM. B. UPPERMAN,y C. H. WATSON. 

